Improvement in soldering-furnaces



1. A. FREY. Soldering Furnaces.

filo/138,626. v Patented May 6111873.

A M FHOTU L I TH O GRAPHIC CO. IV. XI USBORNEIS PROCESS. i

UNITED STATES JOHIIA. FREY, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN SOLDERING-FURNACES.

Specification forming part of Letters Patent No. 138,626, dated May 6, 1873; applica March 21, 1873.

To all whom it may concern:

Be it known that 1, JOHN A. FREY, of J ersey City, in the State of New Jersey, have invented an Improvement in Means for Solderin g Fruit and other Cans, of which the following is a specification:

In soldering with the solderingiron, the surfaces. are generally cold, and on this account the soldered joint may be imperfect.

My invention is in the line of those improvements that look to the dispensing with the use of the soldering-iron, and to the avoidance of imperfect soldering. To this end the solder is used in chips laid upon the surfaces to be soldered, and the solder melted by the heat of these surfaces, the whole can being exposed to heat.

The annexed drawing shows a portable furnace, Figure 1 being a view by vertical section, and Fig. 2 a perspective view; Figs. 3, 4, 5, and 6 being views of parts detached. Fig. 7 is a view by horizontal section on the line an of Fig. 1. t

This furnace may be made of sheet or cast iron. A warming-table is attached thereto. The top plate of the fire-box is covered with a non-conducting substance. Copper cups, with inverted cast-iron cones for heating the cups, are inserted in the holes of the plates, which heat sufficiently to fuse the solder, and thereby vsecurely solder the heads and ends fast to the body of the can.

The several parts of the furnace are thus indicated: Letter or marks the fire-box with the fuel; b, the inverted cones, attached to the copper cup 0, the cone being held to the cup by the pin 01, and can be readily detached; 0, space between the top plate and fire-plate; f, partition dividing the space; g, the dampers. Each cup has a separate flue and damper, to enable the operator to have full control and keep a uniform heat for each cup, the .face of which can be turned out so as to leave shoulders for three or four sizes of cans; h, the fire plate, between which and the top plate i is a space, 0, of on inch. The plate is pierced with the holes necessary to accommodate any number of cones that may be required, the holes being three-quarters of an PATENT OF ICE.

inch larger all around than the nes for the passage of the heat and flame l the way to the flues, thereby economizing f el, and concentrating the heat on the cup where most required. 1

The copper cups can be ma of cast or molded copper, with sockets un erneath for attaching them to the cast-iron es. In the top or face of each cup there is I 1 depression or seat filled with plaster of Par it being a suitable non-conductor, so as t avoid discoloring the heads of cans fr excessive heat. The contact of the tin wi j the copper generates a galvanic action w ich greatly contributes to the flow of the u der, andincreases the affinity that the tin has for the solder.

The top plate '5 has a corresp ding number of holes of less diameter th I the inner plate h, upon the top edge of whi the flange of the cup rests, affording suppo and allowing of the cup being taken out r revolved, when required. This top plate as a flange surrounding each cup, and the s e upon the outer edge, about one inch de or more,

'which spaceis filled in with plas er of Paris,

or other non-conducting substa e, to avoid scorching the operators face and ands when at work. l

The top of the furnace incline at an angle of about twenty degrees, to giv the cans'a cant in soldering. The fire-box has a feeddoor, draft-register, and grate,nd can be lined with fire-brick or soap-sto e of proper thickness. I l

The warming-table j I make f sufficient width to accommodate three or 1 ur rows of cans. On this the resin fuses, that it en ables the operator to handle an 1solder rapidly when he places the cans up I the cups.

Two ordinarily skilled active b s can readily solder the ends on three or fo r thousand cans per day, with the use of a h if bushel of nut or chesnnt hard coal. By th old method five hundred is a good days work or a skilled man. This is a great saving of t n e and fuel.

I claim 1. The copper cup 0 as a heat the can, in combination with the surface for one or iron surface for transmitting the heat from the fuel This specification signed this 19th day of to the cup and can. February, 1873.

2. The annular spaces m m, between the JOHN A. FREY. fire-plate h and the top plate 01, provided with independent dampers for controlling and di- Witnesses: recting the heat to the cups, substantially as JOHN A. MGGRATH,

- described. JOHN P. LAUDRINE. 

